Insulator mounting



Feb. ll, 1930.

T. R. CAMPBELL INSULATOR MOUNTING Filed Dec. 8, 1927 /N VENTOR A TTOI-?NEY Patented Feb. ll, 1930 UNITED STATES PATENT OFFICE TRACY R. CAMPBELL, OF OUTREMONT, QUEBEC, CANADA, ASSIGNOR TO WESTERN ELEG- TRIC COMPANY, INCORPORATED, YORK OF NEW YORK, N. Y., A CORPORATION OF NEW INSULATOR MOUNTING- Application filed ?December 8, 1927, Serial No. 238547, and in Canada August 20, 1927.

10 the cross-arm, and a part which passes through the cross-arm into said recess, the recess being subsequently filled with cementitious material to anchor the key in place.

Referring to the drawings,

F ig. l is a central vertical section through a portion of an insulator mounted in accordance with my invention, the section being taken on the line 1-1 of Fig. 2.

Fig. 2 is a section on the line 2-2 of Fig. l.

Fig. 3 is a perspective view of a portion of an insulator supporting bar or cross-arm fashioned in accordance with my invention.

'Fig. 4 is a perspective View of a substanally U-shaped key used in my invention.

F ig. 5 is a similar view ofa modified form of key.

Fig. 6 is a central vertical section of a portion of an insulator in the process of being mounted, using the modified form of key shown in Fig. 5.

Fig. 7 is a section of the completely mounted insulator using the modified key of Fig. 5,

the section being taken similarly to Fig. 6.

Fig. 8 is a plan view of a portion of an insulator supporting bar having an I-shaped cut ther-ein, preparatory to forming the structure as shown in F ig. 3.

In the drawings like characters of refere'nce indicate corresponding parts in the various views.

In carrying out my invention the insulator 3 is provided with an aXial recess 4 in the base end thereof which orifice is of rectangular cross-section and the walls of which are inclined outwardly from the mouth to the bottom of the recess so that the recess is wider, as it were, at the bottom than at the mouth.

An insulator supporting bar or cross-arm 5 is used and is in the form of a metal bar.

The form of my invention illustrated in Fig s. l- -2-3 4 and 8 will first be described. he supporting bar 5 is first cut with an I-shaped cut 6 (see Fig. 8) which forms two flaps 7.

These fiaps 7 are then turned upwardly (see Fig. 3) which operation forms a rectangular orifice 8 in the bar 5 and the flaps 7 constitute flanges upstanding from two opposite marginal edges of this orifice.

A substantially U-shaped key 9 (see Fig. 4) is employed and this key is formed with lugs 10 extending from the extremities of the arms of the key.

In mounting an insulator according to the form of my invention illustrated in Figs. 1-2 3-4 and 8, the insulator 3 is placed upon the bar 5 so that the orifice 8 in the bar registers with the recess 4 and the upstanding fianges 7 project into the recess 4, (see Fig. l).

The key 9 is then inserted through the orifice 8 and into the recess 4 in the insulator, which recess it only partially fills.

hen in its inserted position (see Fig. 1) the lugs lO of the key engage against the face of the bar 5 remote from the insulator.

The recess 4 is now filled with any suitable cementitious material 11 such as lead or cement, so as to completely fill the remainder of the recess 4 and the portion of the key 9 within the recess is completely imbedded therein so that, when the substance ll hardens, the key 9 is permanently anchored within the recess 4, and, since the lugs 10 thereof are engaged against the opposite face of the bar 5, the insulator 3 is very firmly mounted upon the bar 5.

By making the walls of the recess 4 taper outwardly from the mouth to the bottom, the strength of the mounting is greatly increased upon hardening of the cementitious substance 11.

The form illustrated in Figs. 5, 6 and 7 is slightly modified in that a slightly different form of key 12 is used and the upstanding fianges 7 are omitted, the insulator supporting bar 13 being simply formed with a rectangular orice 14 which registers with the recess 4 in the insulator 3.

In this form, the key 12 is very much the same as the key 9 previously described in that it is substantially U-shaped and is formed with similar lugs 10.

The central branch of the key however is deformed at 15.

In using this mounting, the insulator 3 is placed upon the bar 13 so that the orifice 14: in the bar registers with the recess 3 in the insulator( i The key 12 is then inserted through'the orifice 14 in the bar 13 and into the recess 3 so that the lugs 10 engage against the face of the bari?) remote from the insulator in the same manner as previously explained.

Therelativepositions of the parts are now asshown inFig. 6;

The deformation 15 in the. key is now straightened-out by any suitable tool 'so that the key assumes the form shown in Fg. 7, in; which the base of the key is expanded so as to wedge the sides of the key against the r walls of the recess 4.

Cement 16 is then placed within the recess --'and when it hardens the key will be held in its eXpanded form so' as to be permanently anchord within the recess and since the lugs lO'are engaged against the face of the bar l3 the insulator will be securely mounted upon -the bar 13.

From theforegoing itwill be evident that my invention provides' a very simple and inexpensive mounting for insulators whereby the objects, of my invention have been ati tained.

Various modifications may be made in my invention without departing from the spirit thereof or the scope of the claims and therefore, the exact forms shown are to be taken as illustrative only and not in a limiting with the recess in the insulator, a substantially U-shaped key, lugs eXtending from the s extremities of the arms of the key, the key extending freely through the *orifice in :the bar and into the recess in ,the insulator, the aforesaid lugs on the key engaging the face of the bar remote from the insulator, and means for permanently securing the key within the recess.

2. In an insulator mounting, in combina-- tion, an insulator having a recess in the end thereof, aninsulator supporting bar against i which the recessed end of the insulator rests," said bar having an orifice therein registering With the recess in the insulator,;a substantial,

ly U-shaped key, lugs exten ding from the extremities of the arms of the key, the key eXtending freely through the orifice in the bar and into the recess in the insulator, and partially filling said recess, the aforesaid lugs on the key engaging the face `'of the bar 'remote from the insulator, and cementitious material introduced into said recess subsequently to the insertion of the key thereinto and filling the remainder 'of the recess to permanently' anchor the key therein.

3. In an insulator mounting, in combination, an insulator having a recess of rectangular cross-section inthe end thereof, an insulator supporting bar against which the recessed end of the insulator rests, saidbar having a rectangular orifice therein registering* with the recess in the insulatomfianges upstanding from opposite marginal edgesof the orifice in the bar and extendinginto said' recessin the insulatorand cementitiousma'- terial 'filling the recess and' permanently anchoring the aforesaidflanges therein.

4. In an insulator mounting, in combination, an insulator having a recess of rectangular cross section in the end thereof,. the walls'` of said recess inclined outwardly from the mouth to the bottom thereof, an insulator supporting bar against whichvthe recessed endof the insulator rests', said bar having a `rectangular orifice therein registering with the recess in the insulator, fianges upstanding from opposite marginal edges of the orificei in the bar and extendinginto said recess in the insulator, and cementitious material filling the recess and permanently anchoring the aforesaid fiangestherein.

5. In aninsulator mounting, in combina tion, an insulator having a recess of rectangular cross-section in the end thereof, an insulator supporting ;bar against which the recessed end of the insulator rests, said bar having a rectangular orifice therein registerng with the recess in the insulator, flanges upstanding from' opposite marginal edges of 4 the. orifice in the bar and extending into said recess in the insulator, a substantially U-shaped key, lugs extending from the extremities of i the, arms of the key, the key extending freely through the orifice in the bar and into the recessin the insulator and ,partially filling said recess, the aforesaid lugs on the key engaging v the face of the bar remote *from the insulator,

and cementitious material introduced into said recess subsequently to the nsertion ofthe key thereinto and filling the remainder of the recess to permanently anchor the fianges and key therein.

76. In an insulator mountng, in combination, an insulator having a recess of rectangular cross-sectionin the end thereof, the walls v of said recessinclinedoutwardly from the mouth to the bottom thereof, an insulator( supporting ;bar against which' the recessed end ofthe insulator rests, aid bar having a.,

rectangular orfice theren registering with the recess in the nsulator, flanges upstanding from opposte margnal edges of the orfice in the bar and extending into said recess in the ns'ulator, a substantally U-shaped key, luge extendng from the eXtremtes of the arms of the key, the key eXtendng freely through the orfice in the bar and into the recess in the nsulator and partally filling said recess, the aforesad lugs on the key engagng the face of the bar renote from the nsulator, and cementtous material introdueed into said recess subsequently to the inse'ton of the key therento and filling the remander of the recess to permanently anchor the flanges and key theren.

In wtness Whereof, I hereunto subscribe my name this second day of December, A. D.

TRACY R. CAMPBELL. 

